package com.yetong.domain.strategy.service.rule.tree.factory.engine.impl;

import com.yetong.domain.strategy.model.valobj.RuleLogicCheckTypeVO;
import com.yetong.domain.strategy.model.valobj.RuleTreeNodeLineVO;
import com.yetong.domain.strategy.model.valobj.RuleTreeNodeVO;
import com.yetong.domain.strategy.model.valobj.RuleTreeVO;
import com.yetong.domain.strategy.service.rule.tree.ILogicTreeNode;
import com.yetong.domain.strategy.service.rule.tree.factory.DefaultTreeFactory;
import com.yetong.domain.strategy.service.rule.tree.factory.engine.IDecisionTreeEngine;
import lombok.extern.slf4j.Slf4j;

import java.util.List;
import java.util.Map;

/**
 * 作者：叶童
 * 时间：2025/5/6
 * 决策树引擎
 */
@Slf4j
public class DecisionTreeEngine implements IDecisionTreeEngine {
    private final Map<String, ILogicTreeNode> logicTreeNodeGroup;
    private final RuleTreeVO ruleTreeVO;

    public DecisionTreeEngine(Map<String, ILogicTreeNode> logicTreeNodeGroup, RuleTreeVO ruleTreeVO) {
        this.logicTreeNodeGroup = logicTreeNodeGroup;
        this.ruleTreeVO = ruleTreeVO;
    }

    @Override
    public DefaultTreeFactory.StrategyAwardVO process(String userId, Long strategyId, Integer awardId) {
       DefaultTreeFactory.StrategyAwardVO strategyAwardData=null;

       //获取基本信息
        String nextNode = ruleTreeVO.getTreeRootRuleNode();
        Map<String, RuleTreeNodeVO> treeNodeMap = ruleTreeVO.getTreeNodeMap();
        // 获取起始节点「根节点记录了第一个要执行的规则」
        RuleTreeNodeVO ruleTreeNode = treeNodeMap.get(nextNode);
        while (nextNode!=null){
            // 获取决策节点
            ILogicTreeNode logicTreeNode = logicTreeNodeGroup.get(ruleTreeNode.getRuleKey());
            String ruleValue = ruleTreeNode.getRuleValue();


            // 决策节点计算
            DefaultTreeFactory.TreeActionEntity logicEntity = logicTreeNode.logic(userId, strategyId, awardId,ruleValue);
            RuleLogicCheckTypeVO ruleLogicCheckTypeVO = logicEntity.getRuleLogicCheckType();
            strategyAwardData=logicEntity.getStrategyAwardVO();
            log.info("决策树引擎【{}】treeId:{} node:{} code:{}", ruleTreeVO.getTreeName(), ruleTreeVO.getTreeId(), nextNode, ruleLogicCheckTypeVO.getCode());
            // 获取下个节点
            nextNode=nextNode(ruleLogicCheckTypeVO.getCode(),ruleTreeNode.getTreeNodeLineVOList());
            ruleTreeNode=treeNodeMap.get(nextNode);
        }
        //返回最终结果
        return  strategyAwardData;
    }

    private String nextNode(String matterValue, List<RuleTreeNodeLineVO> ruleTreeNodeLineVOList) {
        if(ruleTreeNodeLineVOList==null||ruleTreeNodeLineVOList.isEmpty()){
            return null;
        }
        for (RuleTreeNodeLineVO nodeLine : ruleTreeNodeLineVOList) {
            if(decisionLogic(matterValue, nodeLine)){
                return nodeLine.getRuleNodeTo();
            }
        }
      return null;

    }

    public boolean decisionLogic(String matterValue, RuleTreeNodeLineVO nodeLine) {
        switch (nodeLine.getRuleLimitType()) {
            case EQUAL:
                return matterValue.equals(nodeLine.getRuleLimitValue().getCode());
            // 以下规则暂时不需要实现
            case GT:
            case LT:
            case GE:
            case LE:
            default:
                return false;
        }
    }

}
